/*
* Copyright (c) 2025 Huawei Device Co., Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including but not limited to the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to provide persons with access to the Software
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGE OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/

import { BreakpointManager } from '../../hooks/breakpoint';
import { Breakpoint } from '../../types/breakpoint';
import { AttributeManager } from '../../hooks/attributeManager';
import { EventManager } from '../../hooks/eventManager';
import { defaultBreakConfig, defaultConfig } from './default';
import { CallbackFunc } from '../../types/eventManager';

/**
 * @description 基于web components实现网格组件父标签
 */
export class GridComponent extends HTMLElement {
  private _property: string[];
  private _elementId: string;
  private _styleElement: HTMLStyleElement | null;
  private _currentBreakpoint: Breakpoint;
  private _unsubscribeBreakpoint: () => void;
  private _attributeManager: AttributeManager;
  private _eventManager: EventManager;

  constructor() {
    super();
    this._styleElement = null;
    this._property = ['scope', 'columns-template', 'rows-template', 'grid-row-gap', 'grid-column-gap', 'justify-items', 'align-items', 'justify-content', 'align-content'];
    this._elementId = '';
    this._attributeManager = new AttributeManager();
    this._eventManager = new EventManager(this);
    const breakpointManager = new BreakpointManager();
    this._currentBreakpoint = 'sm';
    this._unsubscribeBreakpoint = breakpointManager.subscribeToBreakpoint((bp) => {
      this._currentBreakpoint = bp;
      this._attachStyles();
    });
  }

  connectedCallback(): void {
    this._attachStyles();
  }

  disconnectedCallback(): void {
    this._unsubscribeBreakpoint();
  }

  static get observedAttributes(): string[] {
    return ['scope', 'columns-template', 'rows-template', 'grid-row-gap', 'grid-column-gap', 'justify-items', 'align-items', 'justify-content', 'align-content'];
  }

  attributeChangedCallback(name: string, oldValue: string | null, newValue: string | null): void {
    if (this._property.includes(name) && oldValue !== newValue) {
      this._attachStyles();
    }
  }

  private _attachStyles(): void {
    if (this._styleElement) {
      this._styleElement.remove();
    }

    const columnsTemplate = this.getAttribute('columns-template') || defaultBreakConfig.container[this._currentBreakpoint].columnsTemplate;
    const rowsTemplate = this.getAttribute('rows-template') || defaultBreakConfig.container[this._currentBreakpoint].rowsTemplate;
    const gridRowGap = this._attributeManager.processSize(this.getAttribute('grid-row-gap'), defaultConfig.container.gridRowGap);
    const gridColumnGap = this._attributeManager.processSize(this.getAttribute('grid-column-gap'), defaultConfig.container.gridColumnGap);
    const justifyItems = this._attributeManager.processMultiValues(this.getAttribute('justify-items'), ['stretch', 'start', 'center', 'end'], [], defaultConfig.container.justifyItems);
    const alignItems = this._attributeManager.processMultiValues(this.getAttribute('align-items'), ['stretch', 'start', 'center', 'end'], [], defaultConfig.container.alignItems);
    const justifyContent = this._attributeManager.processMultiValues(this.getAttribute('justify-content'), ['stretch', 'start', 'center', 'end', 'space-around', 'space-between', 'space-evenly'], [], defaultConfig.container.justifyContent);
    const alignContent = this._attributeManager.processMultiValues(this.getAttribute('align-content'), ['stretch', 'start', 'center', 'end', 'space-around', 'space-between', 'space-evenly'], [], defaultConfig.container.alignContent);
    const scopeId = this.getAttribute('scope') || '';
    this._elementId = scopeId;
    const style = document.createElement('style') as HTMLStyleElement;
    style.textContent = `
      .${scopeId} {
        display: grid;
        grid-template-columns: ${columnsTemplate};
        grid-template-rows: ${rowsTemplate};
        grid-row-gap: ${gridRowGap};
        grid-column-gap: ${gridColumnGap};
        justify-items: ${justifyItems};
        align-items: ${alignItems};
        justify-content: ${justifyContent};
        align-content: ${alignContent};
        width: 100%;
        height: 100%;
      }

      .${scopeId} multi-grid-item {
        display: flex;
        justify-content: center;
        align-items: center;
        overflow: hidden;
      }
    `;
    this._styleElement = style;
    document.head.appendChild(style);
  }

  registerEvents(callback: CallbackFunc): void {
    const gridInstance = document.querySelectorAll(`*[scope=${this._elementId}]`);
    const gridItems = gridInstance[0].querySelectorAll('multi-grid-item');
    if (gridItems.length) {
      gridItems.forEach((item, index) => {
        item.addEventListener('click', (e) => {
          e.preventDefault();
          this._eventManager.emit('gridItemClick', {
            index,
            name: item.getAttribute('name') || '',
          });
        });
      });
      this._eventManager.on('gridItemClick', callback);
    }
  }
}

if (!customElements.get('multi-grid-container')) {
  customElements.define('multi-grid-container', GridComponent);
}